51840640

素因数分解:

$2^7\times 5^1\times {\mathrm{81001}}^1$

素因数の和:81020

約数の個数: 32

約数和(自身を含む): 123933060

約数和(自身を除く): 72092420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 81001, 162002, 324004, 405005, 648008, 810010, 1296016, 1620020, 2592032, 3240040, 5184064, 6480080, 10368128, 12960160, 25920320, 51840640]

約数ペア:

[(1, 51840640), (2, 25920320), (4, 12960160), (5, 10368128), (8, 6480080), (10, 5184064), (16, 3240040), (20, 2592032), (32, 1620020), (40, 1296016), (64, 810010), (80, 648008), (128, 405005), (160, 324004), (320, 162002), (640, 81001)]